title: How to switch birth control methods.
mesh_terms: D003267:Contraception / Q000379:methods*; D003276:Contraceptives, Oral / Q000008:administration & dosage / Q000627:therapeutic use; D005260:Female; D006801:Humans; D011247:Pregnancy; D011275:Pregnancy, Unwanted
chemical_list: D003276:Contraceptives, Oral